Process for the preparation of the copper complex disazo compounds from disazo compounds containing an O'-alkoxyaniline group by coppering dimethylation at a pH at about 3-6
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United States of America Patent
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Jul 26, 1988
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N/A
app pub date -
Aug 28, 1985
filing date -
Aug 28, 1985
priority date (Note) -
Expired
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Abstract
This invention is that of an improved process for preparing 1:1 copper complex disazo compounds which comprises treating a disazo compound of the following general formula (2): ##STR1## wherein: M is hydrogen or the equivalent monovalent or divalent metal and Y is the vinyl group or CH.sub.2 --CH.sub.2 --Z wherein Z is a radical that can be eliminated by an alkaline agent with a copper donor at a temperature from about 70.degree. to about 130.degree. C. and at a pH from about 3 to about 6. The compounds of the process of the invention are used as dyestuffs.
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